"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : GSC功能模块
Case Name   : 备机gs_gsc_catalog_detail，指定库参数查看缓存信息
Create At   : 2023/05/25
Owner       : @peilinqian
Description :
    1、打开gsc开关;
    2、重启数据库生效;
    3、创建数据库;
    4、创建表并查询;
    5、备机查询所有库并进行连接;
    6、备机查询指定库不存在;
    7、备机查看指定库的缓存信息;
    8、备机三种参数查询所有库;
Expect      :
    1、打开gsc开关; 修改成功
    2、重启数据库生效; 重启成功
    3、创建数据库; 创建成功
    4、创建表并查询; 操作成功
    5、备机查询所有库并进行连接; 连接成功
    6、备机查询指定库不存在; 查询失败
    7、备机查看指定库的缓存信息; 查询结果包含指定数据库及共享库两个
    8、备机三种参数查询所有库; 查询所有库数量正确，且三种方式查询结果相等
History     :
"""
import os
import unittest

from testcase.utils.Common import Common
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Constant import Constant
from testcase.utils.Logger import Logger

pri_sh = CommonSH('PrimaryDbUser')
node_num = pri_sh.get_node_num()


@unittest.skipIf(node_num < 3, '非1主2备环境不执行')
class GscTestCase(unittest.TestCase):

    def setUp(self):
        self.log = Logger()
        self.log.info(f'----{os.path.basename(__file__)}:start----')
        self.log.info("----this is setup----")
        self.db_name = 'db_gsc0056'
        self.tb_name = 'tb_gsc0056'
        self.com = Common()
        self.constant = Constant()
        self.sta1_sh = CommonSH('Standby1DbUser')
        self.err_flag = "ERROR:  dbOid doesn't exist."

    def test_main(self):
        step_txt = '----step0:查看数据库状态是否正常;----'
        self.log.info(step_txt)
        status_result = pri_sh.get_db_cluster_status('status')
        self.assertTrue(status_result, '执行失败:' + step_txt)
        step_txt = '----step0:查看enable_global_syscache初始配置值;----'
        self.log.info(step_txt)
        self.init_para1 = self.com.show_param("enable_global_syscache")

        if self.init_para1 == 'off':
            step_txt = '----step1:打开gsc开关; expect:修改成功----'
            self.log.info(step_txt)
            result = pri_sh.execute_gsguc('set',
                                          self.constant.GSGUC_SUCCESS_MSG,
                                          f"enable_global_syscache= on")
            self.assertTrue(result, '执行失败:' + step_txt)

            step_txt = '----step2:重启数据库生效; expect:重启成功----'
            self.log.info(step_txt)
            restart = pri_sh.restart_db_cluster()
            self.assertTrue(restart, '执行失败:' + step_txt)
            self.is_reset_para = True
        else:
            step_txt = '----gsc开关设置正常，跳过step1、step2----'
            self.log.info(step_txt)
            self.is_reset_para = False

        step_txt = f'----step3:创建数据库; expect:创建成功----'
        self.log.info(step_txt)
        create_db = f'drop database if exists {self.db_name};' \
            f'create database {self.db_name};'
        create_result = pri_sh.execut_db_sql(create_db)
        self.log.info(create_result)
        self.assertIn(self.constant.CREATE_DATABASE_SUCCESS, create_result,
                      '执行失败:' + step_txt)

        step_txt = '----step4:创建表并查询; expect:操作成功----'
        self.log.info(step_txt)
        create_tb_sql = f"create table {self.tb_name} " \
            f"(c_integer integer,c_tinyint tinyint," \
            f"c_smallint smallint,c_binary_integer binary_integer," \
            f"c_bigint bigint,c_numeric numeric(10,4)," \
            f"c_number number(10,4),c_smallserial smallserial);" \
            f"select * from {self.tb_name};"
        create_result = pri_sh.execut_db_sql(create_tb_sql,
                                             dbname=f'{self.db_name}')
        self.log.info(create_result)
        self.assertIn(self.constant.TABLE_CREATE_SUCCESS, create_result,
                      '执行失败:' + step_txt)
        self.assertIn('0 rows', create_result, '执行失败:' + step_txt)

        self.log.info('--等待主备同步--')
        self.sta1_sh.check_location_consistency('standby', node_num)

        step_txt = '----step5:备机查询所有库并进行连接; expect:连接成功----'
        self.log.info(step_txt)
        select_db_sql = "select datname from pg_database where datname " \
                        "not like('template%');"
        select_db_result = self.sta1_sh.execut_db_sql(select_db_sql)
        self.log.info(select_db_result)
        db_list = select_db_result.splitlines()[2:-1:1]
        for i in db_list:
            con_result = self.sta1_sh.execut_db_sql(
                'select current_database();',
                dbname=f'{i}')
            self.log.info(con_result)
            self.assertIn(i, con_result, '执行失败:' + step_txt)

        self.log.info('缓存所有库数量为：所有库+0库')
        self.total_db_num = len(db_list) + 1

        step_txt = '----step6:备机查询指定库不存在; expect:查询失败----'
        self.log.info(step_txt)
        check_sql1 = f"select count(*) from " \
            f"gs_gsc_catalog_detail(123123);"
        select_result = self.sta1_sh.execut_db_sql(check_sql1)
        self.log.info(select_result)
        self.assertIn(self.err_flag, select_result, '执行失败:' + step_txt)

        step_txt = '----step7:备机查看指定库的缓存信息; expect:查询结果包含指定数据库及共享库两个----'
        self.log.info(step_txt)
        db_oid_sql = f"select oid from pg_database where " \
            f"datname = '{self.db_name}';"
        db_oid = self.sta1_sh.execut_db_sql(db_oid_sql).splitlines()[
            -2].strip()
        self.log.info("指定数据库oid：" + db_oid)
        check_result7 = self.check_db_gsc(db_oid)
        self.assertEqual(len(check_result7[0]), 2, '执行失败:' + step_txt)

        step_txt = '----step8:备机三种参数查询所有库; expect:查询所有库数量正确，' \
                   '且三种方式查询结果相等----'
        self.log.info(step_txt)
        self.log.info("----验证三种方式查询每个库的缓存统计结果----")
        check_result8_1 = self.check_db_gsc("null")
        check_result8_2 = self.check_db_gsc("-1")
        check_result8_3 = self.check_db_gsc("")
        self.assertEqual(len(check_result8_1[0]), self.total_db_num,
                         '执行失败:' + step_txt)
        self.assertGreaterEqual(check_result8_2, check_result8_1,
                                '执行失败:' + step_txt)
        self.assertGreaterEqual(check_result8_3, check_result8_2,
                                '执行失败:' + step_txt)

    def check_db_gsc(self, db_oid):
        """
        :param: db_oid: 查询数据库oid
        :return: 返回数据库与对应查询结果字典
        """
        check_sql = f"select database_id,count(*) from " \
            f"gs_gsc_catalog_detail({db_oid}) group by database_id " \
            f"order by database_id;"
        select_result = self.sta1_sh.execut_db_sql(check_sql)
        self.log.info(select_result)
        result = select_result.splitlines()[2:-1]
        db_list = []
        db_dict = dict()
        for i in result:
            key_name = i.split('|')[0].strip()
            key_value = int(i.split('|')[1].strip())
            db_dict[key_name] = key_value
            db_list.append(key_name)
        self.log.info(db_list)
        self.log.info(db_dict)
        return db_list, db_dict

    def tearDown(self):
        step_txt = '----this is teardown----'
        self.log.info(step_txt)
        step1_txt = '----清理数据库; expect:清理成功----'
        self.log.info(step1_txt)
        drop_cmd = f"drop database if exists {self.db_name};"
        drop_result = pri_sh.execut_db_sql(drop_cmd)
        self.log.info(drop_result)

        if self.is_reset_para:
            self.step2_txt = '----恢复参数为初始值并查询; expect:设置成功----'
            self.log.info(self.step2_txt)
            self.msg1 = pri_sh.execute_gsguc('set',
                                             self.constant.GSGUC_SUCCESS_MSG,
                                             f"enable_global_syscache "
                                             f"={self.init_para1}")

            self.step3_txt = '----重启数据库生效; expect:重启成功----'
            self.log.info(self.step3_txt)
            self.restart = pri_sh.restart_db_cluster()
            self.step4_txt = '----查询数据库状态; expect:状态正常----'
            self.log.info(self.step4_txt)
            self.status_result = pri_sh.get_db_cluster_status('status')

        self.log.info(f'----{os.path.basename(__file__)}:end----')
        self.assertIn(self.constant.DROP_DATABASE_SUCCESS, drop_result,
                      "执行失败" + step_txt + step1_txt)
        if self.is_reset_para:
            self.assertTrue(self.msg1, '执行失败:' + self.step2_txt)
            self.assertTrue(self.restart, '执行失败:' + self.step3_txt)
            self.assertTrue(self.status_result, '执行失败:' + self.step4_txt)
